c - iOS开发中，如何从视频数据sampleBuffer中将数据转换成灰度图像数据？

Question

项目中用到了人脸识别，目前工作是需要从摄像头中拿数据传入到人脸算法中。现在数据我通过AVFoundation中的代理方法拿到了原始数据sampleBuffer。 {代码...} 我如何从原始数据sampleBuffer中将数据转成算法能接收...

PHPz · Answer

CVImageBufferRef imageBufferRef=CMSampleBufferGetImageBuffer(sampleBuffer);
    
CVPixelBufferLockBaseAddress(imageBufferRef, 0);
    
unsigned char *ptr_image=CVPixelBufferGetBaseAddressOfPlane(imageBufferRef, 0);
    
unsigned char* dst = (unsigned char *)malloc(sizeof(unsigned char) * 640 * 480 * 4);

其中480 640为传入人脸识别算法的宽和高，具体要看算法要求

黄舟 · Answer

我出在也遇到了这个方法，求指导。

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